This Vieja maculicauda fish is a type of Cichlid fish originating from Central America, namely in Southern Mexico to Panama. This fish is known as the Blackbelt cichlid, why is it called that because if we observe its body parts, there are vertical black lines encircling the body of this fish. In its natural habitat, the Vieja maculicauda fish lives in lakes and rivers that have slow currents. This fish lives in an aquatic environment that has moderate lighting levels. As a freshwater fish and having an attractive body color, the Vieja maculicauda fish are widely kept and used by fish hobbyists as ornamental fish kept in aquariums at home. Vieja maculicauda fish live in aquatic environments that have a good level of water quality. To characterize or know that the water used as a place to raise fish is of good quality, which can be seen from the pH value of the water, the hardness level of the water, and the temperature. The following will describe the value of the three water quality p...